gfs2: write revokes should traverse sd_ail1_list in reverse

All the other functions that deal with the sd_ail_list run the list from the tail back to the head, iow, in reverse. We should do the same while writing revokes, otherwise we might miss removing entries properly from the list when we hit the limit of how many revokes we can write at one time (based on block size, which determines how many block pointers will fit in the revoke block). Signed-off-by: Bob Peterson <[email protected]>
berg · Oct 15, 2018 · c9e58fb · c9e58fb
1 parent 0ddeded
commit c9e58fb
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
@@ -621,7 +621,7 @@ void gfs2_write_revokes(struct gfs2_sbd *sdp)
 
 	gfs2_ail1_empty(sdp);
 	spin_lock(&sdp->sd_ail_lock);
-	list_for_each_entry(tr, &sdp->sd_ail1_list, tr_list) {
+	list_for_each_entry_reverse(tr, &sdp->sd_ail1_list, tr_list) {
 		list_for_each_entry(bd, &tr->tr_ail2_list, bd_ail_st_list) {
 			if (list_empty(&bd->bd_list)) {
 				have_revokes = 1;
@@ -645,7 +645,7 @@ void gfs2_write_revokes(struct gfs2_sbd *sdp)
 	}
 	gfs2_log_lock(sdp);
 	spin_lock(&sdp->sd_ail_lock);
-	list_for_each_entry(tr, &sdp->sd_ail1_list, tr_list) {
+	list_for_each_entry_reverse(tr, &sdp->sd_ail1_list, tr_list) {
 		list_for_each_entry_safe(bd, tmp, &tr->tr_ail2_list, bd_ail_st_list) {
 			if (max_revokes == 0)
 				goto out_of_blocks;